1 /*- 2 * Copyright (c) 1994-1995 S�ren Schmidt 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software withough specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #include <sys/param.h> 32 #include <sys/conf.h> 33 #include <sys/dirent.h> 34 #include <sys/file.h> 35 #include <sys/filedesc.h> 36 #include <sys/proc.h> 37 #include <sys/mount.h> 38 #include <sys/namei.h> 39 #include <sys/stat.h> 40 #include <sys/systm.h> 41 #include <sys/vnode.h> 42 43 #include <i386/linux/linux.h> 44 #include <i386/linux/linux_proto.h> 45 #include <i386/linux/linux_util.h> 46 47 48 struct linux_newstat { 49 u_short stat_dev; 50 u_short __pad1; 51 u_long stat_ino; 52 u_short stat_mode; 53 u_short stat_nlink; 54 u_short stat_uid; 55 u_short stat_gid; 56 u_short stat_rdev; 57 u_short __pad2; 58 u_long stat_size; 59 u_long stat_blksize; 60 u_long stat_blocks; 61 u_long stat_atime; 62 u_long __unused1; 63 u_long stat_mtime; 64 u_long __unused2; 65 u_long stat_ctime; 66 u_long __unused3; 67 u_long __unused4; 68 u_long __unused5; 69 }; 70 71 struct linux_ustat 72 { 73 int f_tfree; 74 u_long f_tinode; 75 char f_fname[6]; 76 char f_fpack[6]; 77 }; 78 79 static int 80 newstat_copyout(struct stat *buf, void *ubuf) 81 { 82 struct linux_newstat tbuf; 83 84 tbuf.stat_dev = uminor(buf->st_dev) | (umajor(buf->st_dev) << 8); 85 tbuf.stat_ino = buf->st_ino; 86 tbuf.stat_mode = buf->st_mode; 87 tbuf.stat_nlink = buf->st_nlink; 88 tbuf.stat_uid = buf->st_uid; 89 tbuf.stat_gid = buf->st_gid; 90 tbuf.stat_rdev = buf->st_rdev; 91 tbuf.stat_size = buf->st_size; 92 tbuf.stat_atime = buf->st_atime; 93 tbuf.stat_mtime = buf->st_mtime; 94 tbuf.stat_ctime = buf->st_ctime; 95 tbuf.stat_blksize = buf->st_blksize; 96 tbuf.stat_blocks = buf->st_blocks; 97 98 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 99 } 100 101 int 102 linux_newstat(struct proc *p, struct linux_newstat_args *args) 103 { 104 struct stat buf; 105 struct nameidata nd; 106 int error; 107 caddr_t sg; 108 109 sg = stackgap_init(); 110 CHECKALTEXIST(p, &sg, args->path); 111 112 #ifdef DEBUG 113 printf("Linux-emul(%ld): newstat(%s, *)\n", (long)p->p_pid, 114 args->path); 115 #endif 116 117 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE, 118 args->path, p); 119 error = namei(&nd); 120 if (error) 121 return (error); 122 NDFREE(&nd, NDF_ONLY_PNBUF); 123 124 error = vn_stat(nd.ni_vp, &buf, p); 125 vput(nd.ni_vp); 126 if (error) 127 return (error); 128 129 return (newstat_copyout(&buf, args->buf)); 130 } 131 132 /* 133 * Get file status; this version does not follow links. 134 */ 135 int 136 linux_newlstat(p, uap) 137 struct proc *p; 138 struct linux_newlstat_args *uap; 139 { 140 int error; 141 struct vnode *vp; 142 struct stat sb; 143 struct nameidata nd; 144 caddr_t sg; 145 146 sg = stackgap_init(); 147 CHECKALTEXIST(p, &sg, uap->path); 148 149 #ifdef DEBUG 150 printf("Linux-emul(%ld): newlstat(%s, *)\n", (long)p->p_pid, 151 uap->path); 152 #endif 153 154 NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE, 155 uap->path, p); 156 error = namei(&nd); 157 if (error) 158 return (error); 159 NDFREE(&nd, NDF_ONLY_PNBUF); 160 161 vp = nd.ni_vp; 162 error = vn_stat(vp, &sb, p); 163 vput(vp); 164 if (error) 165 return (error); 166 167 return (newstat_copyout(&sb, uap->buf)); 168 } 169 170 int 171 linux_newfstat(struct proc *p, struct linux_newfstat_args *args) 172 { 173 struct filedesc *fdp; 174 struct file *fp; 175 struct stat buf; 176 int error; 177 178 fdp = p->p_fd; 179 180 #ifdef DEBUG 181 printf("Linux-emul(%ld): newfstat(%d, *)\n", (long)p->p_pid, args->fd); 182 #endif 183 184 if ((unsigned)args->fd >= fdp->fd_nfiles || 185 (fp = fdp->fd_ofiles[args->fd]) == NULL) 186 return (EBADF); 187 188 error = fo_stat(fp, &buf, p); 189 if (!error) 190 error = newstat_copyout(&buf, args->buf); 191 192 return (error); 193 } 194 195 struct linux_statfs_buf { 196 long ftype; 197 long fbsize; 198 long fblocks; 199 long fbfree; 200 long fbavail; 201 long ffiles; 202 long fffree; 203 linux_fsid_t ffsid; 204 long fnamelen; 205 long fspare[6]; 206 }; 207 208 #ifndef VT_NWFS 209 #define VT_NWFS VT_TFS /* XXX - bug compatibility with sys/nwfs/nwfs_node.h */ 210 #endif 211 212 #define LINUX_CODA_SUPER_MAGIC 0x73757245L 213 #define LINUX_EXT2_SUPER_MAGIC 0xEF53L 214 #define LINUX_HPFS_SUPER_MAGIC 0xf995e849L 215 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L 216 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L 217 #define LINUX_NCP_SUPER_MAGIC 0x564cL 218 #define LINUX_NFS_SUPER_MAGIC 0x6969L 219 #define LINUX_NTFS_SUPER_MAGIC 0x5346544EL 220 #define LINUX_PROC_SUPER_MAGIC 0x9fa0L 221 #define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */ 222 223 /* 224 * ext2fs uses the VT_UFS tag. A mounted ext2 filesystem will therefore 225 * be seen as an ufs/mfs filesystem. 226 */ 227 static long 228 bsd_to_linux_ftype(int tag) 229 { 230 231 switch (tag) { 232 case VT_CODA: 233 return (LINUX_CODA_SUPER_MAGIC); 234 case VT_HPFS: 235 return (LINUX_HPFS_SUPER_MAGIC); 236 case VT_ISOFS: 237 return (LINUX_ISOFS_SUPER_MAGIC); 238 case VT_MFS: 239 return (LINUX_UFS_SUPER_MAGIC); 240 case VT_MSDOSFS: 241 return (LINUX_MSDOS_SUPER_MAGIC); 242 case VT_NFS: 243 return (LINUX_NFS_SUPER_MAGIC); 244 case VT_NTFS: 245 return (LINUX_NTFS_SUPER_MAGIC); 246 case VT_NWFS: 247 return (LINUX_NCP_SUPER_MAGIC); 248 case VT_PROCFS: 249 return (LINUX_PROC_SUPER_MAGIC); 250 case VT_UFS: 251 return (LINUX_UFS_SUPER_MAGIC); 252 } 253 254 return (0L); 255 } 256 257 int 258 linux_statfs(struct proc *p, struct linux_statfs_args *args) 259 { 260 struct mount *mp; 261 struct nameidata *ndp; 262 struct statfs *bsd_statfs; 263 struct nameidata nd; 264 struct linux_statfs_buf linux_statfs_buf; 265 int error; 266 caddr_t sg; 267 268 sg = stackgap_init(); 269 CHECKALTEXIST(p, &sg, args->path); 270 271 #ifdef DEBUG 272 printf("Linux-emul(%d): statfs(%s, *)\n", p->p_pid, args->path); 273 #endif 274 ndp = &nd; 275 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args->path, curproc); 276 error = namei(ndp); 277 if (error) 278 return error; 279 NDFREE(ndp, NDF_ONLY_PNBUF); 280 mp = ndp->ni_vp->v_mount; 281 bsd_statfs = &mp->mnt_stat; 282 vrele(ndp->ni_vp); 283 error = VFS_STATFS(mp, bsd_statfs, p); 284 if (error) 285 return error; 286 bsd_statfs->f_flags = mp->mnt_flag & MNT_VISFLAGMASK; 287 linux_statfs_buf.ftype = bsd_to_linux_ftype(bsd_statfs->f_type); 288 linux_statfs_buf.fbsize = bsd_statfs->f_bsize; 289 linux_statfs_buf.fblocks = bsd_statfs->f_blocks; 290 linux_statfs_buf.fbfree = bsd_statfs->f_bfree; 291 linux_statfs_buf.fbavail = bsd_statfs->f_bavail; 292 linux_statfs_buf.fffree = bsd_statfs->f_ffree; 293 linux_statfs_buf.ffiles = bsd_statfs->f_files; 294 linux_statfs_buf.ffsid.val[0] = bsd_statfs->f_fsid.val[0]; 295 linux_statfs_buf.ffsid.val[1] = bsd_statfs->f_fsid.val[1]; 296 linux_statfs_buf.fnamelen = MAXNAMLEN; 297 return copyout((caddr_t)&linux_statfs_buf, (caddr_t)args->buf, 298 sizeof(struct linux_statfs_buf)); 299 } 300 301 int 302 linux_fstatfs(struct proc *p, struct linux_fstatfs_args *args) 303 { 304 struct file *fp; 305 struct mount *mp; 306 struct statfs *bsd_statfs; 307 struct linux_statfs_buf linux_statfs_buf; 308 int error; 309 310 #ifdef DEBUG 311 printf("Linux-emul(%d): fstatfs(%d, *)\n", p->p_pid, args->fd); 312 #endif 313 error = getvnode(p->p_fd, args->fd, &fp); 314 if (error) 315 return error; 316 mp = ((struct vnode *)fp->f_data)->v_mount; 317 bsd_statfs = &mp->mnt_stat; 318 error = VFS_STATFS(mp, bsd_statfs, p); 319 if (error) 320 return error; 321 bsd_statfs->f_flags = mp->mnt_flag & MNT_VISFLAGMASK; 322 linux_statfs_buf.ftype = bsd_to_linux_ftype(bsd_statfs->f_type); 323 linux_statfs_buf.fbsize = bsd_statfs->f_bsize; 324 linux_statfs_buf.fblocks = bsd_statfs->f_blocks; 325 linux_statfs_buf.fbfree = bsd_statfs->f_bfree; 326 linux_statfs_buf.fbavail = bsd_statfs->f_bavail; 327 linux_statfs_buf.fffree = bsd_statfs->f_ffree; 328 linux_statfs_buf.ffiles = bsd_statfs->f_files; 329 linux_statfs_buf.ffsid.val[0] = bsd_statfs->f_fsid.val[0]; 330 linux_statfs_buf.ffsid.val[1] = bsd_statfs->f_fsid.val[1]; 331 linux_statfs_buf.fnamelen = MAXNAMLEN; 332 return copyout((caddr_t)&linux_statfs_buf, (caddr_t)args->buf, 333 sizeof(struct linux_statfs_buf)); 334 } 335 336 int 337 linux_ustat(p, uap) 338 struct proc *p; 339 struct linux_ustat_args *uap; 340 { 341 struct linux_ustat lu; 342 dev_t dev; 343 struct vnode *vp; 344 struct statfs *stat; 345 int error; 346 347 #ifdef DEBUG 348 printf("Linux-emul(%ld): ustat(%d, *)\n", (long)p->p_pid, uap->dev); 349 #endif 350 351 /* 352 * lu.f_fname and lu.f_fpack are not used. They are always zeroed. 353 * lu.f_tinode and lu.f_tfree are set from the device's super block. 354 */ 355 bzero(&lu, sizeof(lu)); 356 357 /* 358 * XXX - Don't return an error if we can't find a vnode for the 359 * device. Our dev_t is 32-bits whereas Linux only has a 16-bits 360 * dev_t. The dev_t that is used now may as well be a truncated 361 * dev_t returned from previous syscalls. Just return a bzeroed 362 * ustat in that case. 363 */ 364 dev = makebdev(uap->dev >> 8, uap->dev & 0xFF); 365 if (vfinddev(dev, VBLK, &vp)) { 366 if (vp->v_mount == NULL) 367 return (EINVAL); 368 stat = &(vp->v_mount->mnt_stat); 369 error = VFS_STATFS(vp->v_mount, stat, p); 370 if (error) 371 return (error); 372 373 lu.f_tfree = stat->f_bfree; 374 lu.f_tinode = stat->f_ffree; 375 } 376 377 return (copyout(&lu, uap->ubuf, sizeof(lu))); 378 } 379